Patents Assigned to Nowsco Well Service, Inc.
  • Anionic compositions for sludge prevention and control during acid stimulation of hydrocarbon wells
    Patent number: 5622921
    Abstract: This invention relates to anionic compositions, containing an alkyl aryl sulfonic acid or salt thereof, a nonethoxylated glycol and an acetylenic alcohol in an alkyl alcohol solvent, that have proved effective for controlling sludge and emulsion formation during acid stimulation and treatment of hydrocarbon wells.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: April 22, 1997
    Assignee: Nowsco Well Service, Inc.
    Inventor: Richard J. Dyer